Electrochemical comparison of LiFePO4 synthesized by a solid-state method using either microwave heating or a tube furnace
| Autor: | Arnaldo Visintin, German Lener, Jorge Enrique Thomas, Daniel E. Barraco, Cecilia A. Calderón |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Analytical chemistry Sintering 02 engineering and technology Lithium iron phosphate 010402 general chemistry 01 natural sciences law.invention purl.org/becyt/ford/1 [https] LITHIUM IRON PHOSPHATE chemistry.chemical_compound law CATHODE Lithium-ion battery purl.org/becyt/ford/1.4 [https] Materials Chemistry Electrochemistry LITHIUM-ION BATTERY Tube furnace MICROWAVE Inert gas Ciencias Exactas Otras Ciencias Químicas Ciencias Químicas Química 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Dielectric spectroscopy chemistry Cyclic voltammetry 0210 nano-technology Microwave CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP |
| ISSN: | 1572-8838 0021-891X |
| DOI: | 10.1007/s10800-017-1111-0 |
| Popis: | LiFePO4/C composites were successfully prepared by a solid-state reaction in order to compare conventional heat treatment and microwave-assisted synthesis at different times of sintering. Microwave-assisted synthesis is interesting due to the fact that energy and inert gas consumption can be greatly reduced with respect to the conventional treatment, resulting in a cheaper synthesis method. The relationship between particle morphology and crystal structure using the composite synthesis was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) with refinements of the crystal structures carried out by the Rietveld method. In addition, the electrochemical performances were evaluated using constant current charge/discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). It was observed that the samples prepared by microwave heating had a better electrochemical behavior than those prepared in a conventional furnace. Also, in general, a higher sintering time improved the electrochemical behavior, but with increased particle sizes, and consequently, a decreased specific capacity. Facultad de Ciencias Exactas Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
| Databáze: | OpenAIRE |
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